using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
/// <summary>
/// 县级视角得企业信息
/// </summary>
[Serializable]
public class AreaCompanyInformationData
{
    /// <summary>
    /// 
    /// </summary>
    public int code;
    /// <summary>
    /// 
    /// </summary>
    public string success;
    /// <summary>
    /// 
    /// </summary>
    public List<AreaCompany> data;
    /// <summary>
    /// 操作成功
    /// </summary>
    public string msg;
}
[Serializable]
public class AreaCompany
{
    /// <summary>
    /// 
    /// </summary>
    public string consId;
    /// <summary>
    /// 
    /// </summary>
    public string consNo;
    /// <summary>
    /// 莱芜供电公司大楼
    /// </summary>
    public string consName;
    /// <summary>
    /// 
    /// </summary>
    public double longitude;
    /// <summary>
    /// 
    /// </summary>
    public double latitude;
    /// <summary>
    /// 
    /// </summary>
    public string resourceType;
}

[Serializable]
public struct Coordinate
{
    //经度
    public double lon;

    //纬度
    public double lat;

    //高度
    public double alt;
}
[Serializable]
public struct Vector2D
{
    public double x;
    public double y;

    public Vector2D(double x, double y)
    {
        this.x = x;
        this.y = y;
    }

    //距离
    public double DistanceTo(Vector2D v)
    {
        var dx = x - v.x;
        var dy = y - v.y;
        return Math.Sqrt(dx * dx + dy * dy);
    }

    //加法
    public Vector2D Plus(Vector2D v)
    {
        return new Vector2D(x + v.x, y + v.y);
    }

    //减法
    public Vector2D Minus(Vector2D v)
    {
        return new Vector2D(x - v.x, y - v.y);
    }

    //乘法，除相当于乘1/v
    public Vector2D Multiply(double v)
    {
        return new Vector2D(x * v, y * v);
    }

    //叉乘
    public double Cross(Vector2D v)
    {
        return x * v.y - y * v.x;
    }

    //点在直线ab的右侧
    public bool IsOnRight(Vector2D a, Vector2D b)
    {
        return Cross(b.Minus(a)) >= 0;
    }

    public Vector3 ToVector3(float height)
    {
        return new Vector3((float)x, height, (float)y);
    }

    public Coordinate ToCoord(double alt)
    {
        return new Coordinate { lon = x, lat = y, alt = alt };
    }
}

public static class WebApiExtension
{
    public static Vector3 AsVector3(this Coordinate target)
    {
        //return new Vector3(Lon2X(target.lon), (float)target.alt - 1982, Lat2Z(target.lat));
        return L2V(new Vector2D(target.lon, target.lat)).ToVector3((float)target.alt - 1982);
    }

    public static Coordinate AsCoord(this Vector3 target)
    {
        //return new Coordinate {lon = X2Lon(target.x), alt = target.y + 1982f, lat = Z2Lat(target.z)};
        return V2L(new Vector2D(target.x, target.z)).ToCoord(target.y + 1982);
    }

    public static Vector3[] AsVector3S(this Coordinate[] target)
    {
        return target.Select(c => c.AsVector3()).ToArray();
    }

    public static Coordinate[] AsCoords(this IEnumerable<Vector3> target)
    {
        return target.Select(v => v.AsCoord()).ToArray();
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="x"></param>
    /// <param name="t1"></param>
    /// <param name="t2"></param>
    /// <param name="s1"></param>
    /// <param name="s2"></param>
    /// <returns></returns>
    public static double Remap(double x, double t1, double t2, double s1, double s2)
    {
        //return (s2 - s1) / (t2 - t1) * (x - t1) + s1;
        return (x - t1) / (t2 - t1) * (s2 - s1) + s1;
    }

    /// <summary>
    /// 经度转X  东西经  南北纬
    /// </summary>
    /// <returns></returns>
    // public static float Lon2X(double x)
    // {
    //     //return (float)Remap(x, 103.75417182054126, 103.757260683307, -164.08, 141.841);
    //     return (float)Remap(x, 103.7573234, 103.7542207, 141.5, -163.9);
    // }
    // public static double X2Lon(double x)
    // {
    //     //return Remap(x, -164.08, 141.841, 103.75417182054126, 103.757260683307);
    //     return Remap(x, 141.5, -163.9, 103.7573234, 103.7542207);
    // }
    private static Vector2D _LA = new Vector2D(122.70258955842212, 37.40090039325806);
    private static Vector2D _LB = new Vector2D(118.2260388213308, 34.39627721967489);
    private static Vector2D _LC = new Vector2D(115.29544950948309, 36.50134572113451);

    private static Vector2D _VA = new Vector2D(-59.36, -30.82);
    private static Vector2D _VB = new Vector2D(4.03, 37.31);
    private static Vector2D _VC = new Vector2D(56.41, -3.06);


    public static void SetVector2D(Vector2D _LAT, Vector2D _LBT,Vector2D _LCT, Vector2D _VAT, Vector2D _VBT, Vector2D _VCT)
    {
        _LA = _LAT;
        _LB = _LBT;
        _LC = _LCT;
        _VA = _VAT;
        _VB = _VBT;
        _VC = _VCT;
    }


    //由经纬度转米。根据三点转化
    private static Vector2D L2V(Vector2D p)
    {
        var abc = Square(_LA, _LB, _LC);
        var bcp = Square(_LB, _LC, p);
        var acp = Square(_LC, _LA, p);
        var abp = Square(_LA, _LB, p);
        var k1 = bcp / abc;
        var k2 = acp / abc;
        var k3 = abp / abc;
        // Debug.Log($"square : {abc} ==> {bcp} == {acp} == {abp}");
        // Debug.Log($"{k1} == {k2} == {k3} ==> {k1+k2+k3}");
        return _VA.Multiply(k1).Plus(_VB.Multiply(k2)).Plus(_VC.Multiply(k3));
    }

    //由米转经纬度。根据三点转化
    private static Vector2D V2L(Vector2D p)
    {
        var abc = Square(_VA, _VB, _VC);
        var bcp = Square(_VB, _VC, p);
        var acp = Square(_VC, _VA, p);
        var abp = Square(_VA, _VB, p);
        var k1 = bcp / abc;
        var k2 = acp / abc;
        var k3 = abp / abc;
        // Debug.Log($"square : {abc} ==> {bcp} == {acp} == {abp}");
        // Debug.Log($"{k1} == {k2} == {k3} ==> {k1+k2+k3}");
        return _LA.Multiply(k1).Plus(_LB.Multiply(k2)).Plus(_LC.Multiply(k3));
    }

    private static double Square(Vector2D a, Vector2D b, Vector2D c)
    {
        //海伦－秦九韶公式
        var ab = a.DistanceTo(b);
        var ac = a.DistanceTo(c);
        var bc = b.DistanceTo(c);
        var p = (ab + bc + ac) / 2;
        var s = Math.Sqrt(p * (p - ab) * (p - bc) * (p - ac));
        if (!c.Minus(a).IsOnRight(a, b)) s *= -1;
        return s;
    }
}